How to increase glutathione levels: 4 natural ways Glutathione is such an important antioxidant in human physiology, meaning it acts to combat oxidative stress. Strategies for increasing glutathione include: Consume sulfur rich foods like cruciferous vegetables Ensure you get Frontiers Organic formulation modulating crop health, yield and managing anthracnose twister and Stemphylium blight of onion Onions contain vitamin C and B 6 which are important for the production of glutathione, a sulphur containing protein that acts as an antioxidant for the lens of the eye. Raising glutathione levels 1,259 Glutathione Foods Royalty Free Images, Stock Photos & Pictures Shutterstock Caret Organic Glutathione & Vitamin C Soap (75g), Onion Oil (100ml) AND Vitamin C Daily Radiance Cream (50g)